Lock.



"1. Di KARLE.

LOCK. I APPLICATIOH EIL'ED NOV. 11,1916.

1,283,525. Patented Nov. ,5; 1918.

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UNITED STATES PATENT OFFICE.

JOHN 1). KARLE, or ROSELLEF PARK, NEW JERSEY, ASSIGNOR TO THE 'snvenn EMANU- rao'runme COMPANY, A CORPORATION or NEW JERSEY.

LOCK;

Specification of Letterslatent. I Patented NO 5, 1918,

' Application filed November 11, 1916. Serial No. 130,723.

To all whom it may concern:

Be it known that I, JOHN D. KARLE, a citizen of the United States, residing at Roselle Park, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its object partly to provide a simple and effective furniture lock, such as are commonly employed in sewing machine cabinets, and partly to simplify and reduce the cost of manufacture of such locks.

In the construction of locks of this class heretofore, it has been customary to form the casing in separate parts which were necessarily assembled subsequent to the insertion of the bolt, and a separate detent spring-plate was introduced within the boltcavity of the casing for restraining the bolt from working out of extreme looking or unlocking position.

In a preferred embodiment of the present invention, the lock comprises a bolt in the form of a flat plate cut from a metal strip indented in one face to form a projecting boss upon the opposite face and having detent receiving holes adjacent said boss, combined with a casing formed of a single sheetmetal blank suitably pierced, indented and shaped to form a rectangular shell embracing said bolt with said boss journaled therein, the back of the casing aifordingaspring confining member having a detent projection adapted to enter the detent-receiving holes of the bolt in extreme-locklng or unlocking positions of the latter.

The invention will be understood by reference to the accompanying drawings, in which Figure 1 is a face view ofthe casing blank cut from a sheet-metal band or ribbon, which is represented in dotted lines, and Fig. 2 a similar view of the bolt, also cut from a sheet-metal band or ribbon. Fig. 3 is a perspective view of the partially formed casing in readiness for reception of the bolt, which is indicated therein in dotted lines. Fig. 4 is a perspective view of the completed lock with the back and sides closed in to form a bolt cavity, with the bolt in locking position and the key inserted crosswise relation with the casing.

cabinet provided with a lock 'embodying'the present invention, with the bolt entering its cavity or recess in the front of a drawer.

As represented in Fig. '1, the blank 1 ,is preferably cut from a band or ribbon 2 of sheet-steel in the desired outline in a'single operation. In a succeeding operation, the

rectangular slots 3 and the central bearing aperture 4 are pierced in the body of the blank which is indented at one side at 5 to form a detent projection 5 upon'the opposite face.

By means of suitable dies, the blank is 'then shaped by bending up the marginal portions of the blank to form outwardly inclined sides 6 with connected back members 7 and the ends 8 having the lateralfianges 9 formed at their extremities with the fastening prongs 10 of which those at the side opposite the detent-carrying back member are bent at right angles to their respective 'fianges 9.

The'bolt 11 is preferably cut from a sheet steel strip 12, then pierced with the detentreceiving holes 13 and elongated key-hole 14- and "centrally indented at 15 in one face to produce upon the opposite face the projecting boss 15.

The bolt as thus formed is dropped into the partially shaped casing, as represented in dotted lines in Fig. 3, and the shaping completed by bending the sides 6 to right angles with the front and the back members 7 over upon the bolt in parallelism with the front of the casing, as represented in Fig. 4. l

The slots 3 in the side members 6 obviously afford clearance to permit the pivotally mounted bolt to move between lengthwise and The one of these slotsbetween the front and the back member carrying the detent 5 further serves *to form said back member into a bow-spring whose opposite ends join the main bodyportion of the casing and Whose intermediate portions possesses the requisite degree of resilience to cause the projection 5, which has a rounded extremity, to enter and withdraw from the detent holes 18 of the bolt' in the extreme positions of the same. The

bolt is preferably made with four holes 13 spaced a quadrant apart, so that either pair of ad acent holes will cooperate with the detent-stud or projection 5, thereby permitting the bolt to'be dropped in position and the partially shaped casing without special care on the part of the operator to place the parts in operative relations.

The lock may be applied to a sewing machine cabinet in the usual manner, the frame a being provided with acrossbar 6 having a vertical slot in which the casing is dropped edgewise with the upper fastening prongs 1O resting upon the top of the member 6, the lower prongs 10 being subsequently bent over as represented in dotted lines in Fig. 5 to hold the casing securely in place. The drawer (Z is shown formed with a front 6 having in its lower edge the slot or cavity f to receive one end of the bolt 11 the other end of which may be received in a similar slot in the upper! edge of a lower drawerfront.

It is evident that the bolt may be shortened so that only one end will be projected from the casing to look a single drawer. The casing blank and the bolt have been de scribed as cut from their respective sheetmetal strips without regard to the order of the diil'erent operations thereon, but it is customary to sever the blank from the body of the strip only in connection with the final operation upon the Hat blank, so as to insure the correct position of the apertures and projections formed therein while in such fiat condition.

It is evident that the present improvement is susceptible of material modification from the embodiment herein shown and described, and that the present invention not therefore limited to that specifically'shown and described herein.

Having thus set forth the nature of the invention, what I claim herein is l. A lock comprising a bolt composed of a single piece of metal and an inclosing casing composed of another single piece of metal within which said bolt is movably confined, said casing being formed with a bow-spring member i'oined at its opposite ends to said casing, the central portion of said bowspring member and the bolt being provided with detaining means for maintaining said bolt in an extreme position.

A lock comprising a bolt and a onepiece inclosing casing therefor with front and back portions connected together by folds, one of said portions including a bowspring member joined at its opposite ends to said casing and an intermediate portion of which is disposed in contact relation with the adjacent face of the bolt.

A look comprising a bolt, a folded sheetmetal inclosing casing, one side wall of said casing including an elongated resilient member of less width than said casing, the opposite ends of which resilient member join the main body-portion of-said' casing and an intermediate portion of which is adapted to yieldingly press upon said bolt to maintain it in looking or unlocking position.

i. A look comprising a one-piece casing formed with a sheet-metal blank the central portion of which forms the front side of the casing and upper and lower adjoining portions of which are bent over to form the back side of the casing and one of which is cut away to afford an opening at the edge portion of said casing and a bolt pivotally mounted within said casing and adapted to project through said opening.

A look comprising a one-piece casing formed from a sheet-metal blank the central portion of which forms the front side of the casing and the upper and lower adjoining portions of which are bent over to form the back side of the casing and are cut away to alford openings at the opposite edge-por tions of said. casing, and a bolt pivotally mounted within said. casing and adapted to project through at least one of said openings.

6. A look comprising a casing formed from a sheet-metal blank an intermediate portion of which forms the front side of said casing and opposite edge portions of which are bent over to form the back side of said casing and a bolt movably confined Within said casing.

T. A lock comprising a casing formed from a sheet-metal blank, an intermediate portion 0t which is formed with an aperture and constitutes the front side of said casing, and opposite edge portions of which blank form the back side of said casing, and a sheetmetal bolt confined within said casing and having a portion struck up from one side face of said bolt and fitted to turn within said aperture.

In testimony whereof I have signed my name to this specification.

JOHN D. KARLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

